Padlock



Nov. 5, 1929. w. R. MAXWELL PADLOCK 2 Sheets-Sheet l F'led Feb. l5, 1929 @Mgg Nov. 5, 1929.

. W. R. MAXWELL vPADLOCK Filed Feb. 15, 1.929 2 Sheets-sheet 2 ATTORNEY Patented Nov. 5, 1929 UHT 'ies' yIADLOCIK Application filed February 15, 1929. Serial No. 340,149.

This invention relates to padlocks and has for an object the provision of arlock of this type which is simple and durable in construen tion, reliable and eficient in use, and which,

due to its construction, will resist efforts to force the lock.

Another obj ect of the invention is the provision of a lock which will provide a practically unlimited number of key changes due to the character and arrangement of the tum- Y blers, the construction and arrangement of the latter being such as to receive the thrust or strain in an endwise direction, so that the tumblers may be made relatively thin and arranged in compact form.

With the above and other objects in view, the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawings, and

pointed out in the appended claims.

In the drawings Figure 1 is a view of a lock constructed in accordance with the invention with one section of the case removed and the shackle eX- tension shown in section, the lock being in locked position.

Figure 2 is a like view showing the shackle released.

Figure 3 is an end view. y Figures4 and 5 are sections taken respectively on the lines 4-4 and 5-5 of Figure 1.

Figure 6 is a top plan view. Figure 7 is a bottom plan view, and Figure 8 is a side view of the key. Referring to the drawings in detail wherein like characters of reference denote correspending parts, the lock case as shown is,

formed of a pair of complemental sections 10 which are recessed to accommodate the lock at one end with a socket 15 which rotatably Y receives the adj acent end of the shackle. The extension 14 has a sliding iitwithin the case and is non-rotatable and carries spaced pins 16 which engage an annular groove 17 so that a swiveled connection is provided.' The extension 14 is provided with an opening 18 which receives a spring 19 and the latter is tensioned to force thefshackle outward when saidA shackle is released.

The shackle extension 14 is provided in one face witha notch 20having a shoulder 21 at one end and this shoulder is adapted tofbe engaged by the inclined edges 22 of tumblers or locking plates 28. The tumblers or plates.

23 are pivotally mounted upon a stud or bolt 24which, as shown in Figure 4 of the drawings, alsol serves to hold the sections of the case together; i

The tumblers or plates 23 are substantially ltrianguiar 4in shape and are provided at one corner with a shoulder 25. This last mentioned shoulder isY adapted to engage a l sion 14 when the shackle is in the position Y shown in'Figure 1.," The shackle will thus be held against outward movement..

Tn order to release the shackle a' key 27 is provided.; This key is formed at oneend witha numberof steps 28, there being a step for each of the tumblers`23. The key is inserted within thelock through a slot 29so that the steps engage the locking plates or' tumblers. vAs the key is forced inward the inclined portions 22 will be withdrawn from the path ofthe shoulder 21 so that theshackle will be released. In order to preventythe shoulders or stops 25' of the tumblers from engaging the shoulder 26 and thus prevent outward movement of thev shackle, the key 2 7 is proyided with a shoulder or shoulders 30 which engage the lockccase to limit inward movement of the key. Should the wrong key be used in the lock, one or more of the tumblers would be moved pivotally a sufficient distance when the inclinededge 22 iswithdrawn from the extension 14 to cause the shoulder or stop 25 `to engage the shoulder 26 and thus hold the shackle against outward movement.

In order to hold the shackle against accidental inward movement, the shackle is provided with a groove 3l which is adapteclto,y receive a guide pin 32 carried by the case, and when the shackle is in the position shown in Figure 2, it is necessary to rotate the shackle before the short leg can enter the socketI 12,A rlhe shackle is alsoy provided with a recess?! which engages the pin 32 to guide the, short leg of the shackle into the socket.

The invention is. susceptible of various, changes in its torni, proportions and minor details of construction and the right is herein kreserved to make suchfchanges as properly fall within the scope of the appendedclaims.

I-Iaving described the invention whatfis. claimed is V l. In a lock, a case having spaced openings in one wall, a shackle having a long leg slidable and rot-atable inone of the openings and ay relatively short leg removablyV positioned within the other opening, a non-rotatable eXf. tension having a swiveled connection with the long leg of the shackle, a shoulder pro.- vided upon the long leg, spring iniiuenced key operated locking plates engaging the extension to hold the shoulder in locked position, and means included in the locking plates to engage the shoulder and prevent release of the shackle. y

2. In a lock, a case having spaced openings in one wall, a shackle having a long leg slidable and rotatable in one of the openings andy a relatively short leg removably positioned within the other opening, a non-rotatable eX- tension having a swiveled connection with the long leg of the shackle, a shoulder provided upon the long leg, pivotally mounted spring influenced locking plates engaging the extension to hold the shackle in locked position,

Vand meansincluded in the locking plates to engage the shoulder and yprevent release of the shackle.

second shoulder and shackle.

4:. In a lock, a case having spaced openings in one wall, a shackle having a long leg slidable and rotatable in one of the openings and a relatively short leg removably positioned within the other opening, a non-rotatable eX- tension having aswiveled connection with the long leg of the shackle and having a recess in one side providing an inclined shoulder, spring-influenced key-operated locking plates, each of said plates having an inclined edge to engage the inclined shoulder of the shackle extension, a shouldel provided upon each of the inclined plates and spaced from the in- @lined @des 0i Sai- 1 plates and. a' wend shouldernwvded upon, the Shakls extension and adapted to be engaged the shoulders of the locking plates.

prevent release of the In testimony Whereef I-ax my signature WILLIAM RAY' 3.1In a lock. a case having spaced openings in one wall, a shackle having a long leg slidable and rotatable in one of the openings and .a relatively short leg removably positioned within the other opening7 a non-rotatable eX- tension having a swiveled connection with the long leg of the shackle and a shoulder at (Te side, spring influenced key operated locking plates engaging the shoulder to hold the shackle in locked position, a second shoulder provided upon the extension, vand means ineluded in the locking plates to engage said 

